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Hot Gas Testing Results of Stagnant Volume Filling Through a Back-Filled RSRM Nozzle JointSilicone rubber is back-filled into RSW nozzle joints after assembly. A possible artifact of this process is the formation of small pathways through this filter leading to sensitive sealing materials within the joint. At motor ignition, hot gases fill the stagnant volumes within the joint through this path. A series of 14 test has been completed studying this scenario and providing anchoring data for thermal/flow models. Parameters such as gas path cross section, gas path length, gas path materials, fill volume size, and post path gas spreading prior to unpingement on seal material, have been investigated. Tests were accomplished using geometry similar to RSRM nozzle joint 4 with attached volumes replicating the free volume and flow friction in the actual hardware. The test hardware simulated 8 inches of the full-scale circumference. Testing has pointed to changes required in model boundary condition assumptions and gas dynamics corrections for gas paths of this size and geometry. Areas ,where this date has provided improvement in analysis models will be covered as well as model inadequacies that require separate specialized efforts. Questions remaining after this testing and a possible direction for future testing will be suggested.
Document ID
19990062252
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Prince, Andrew S.
(Thiokol Chemical Corp. Brigham City, UT United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1999
Subject Category
Mechanical Engineering
Report/Patent Number
AIAA Paper 99-2792
Meeting Information
Meeting: Joint Propulsion
Location: Los Angeles, CA
Country: United States
Start Date: June 20, 1999
End Date: June 24, 1999
Sponsors: American Society of Mechanical Engineers, American Inst. of Aeronautics and Astronautics, American Society for Electrical Engineers, Society of Automotive Engineers, Inc.
Distribution Limits
Public
Copyright
Other

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